CELLULOSE ETHERS (MHEC)

Methyl Hydroxyethyl Cellulose(MHEC) yog ib hom cellulose ether uas tau siv dav hauv ntau lub lag luam rau nws cov khoom siv ntau yam. Nov yog ib qho piv txwv ntawm MHEC:

Qauv:

MHEC yog ib qho kev hloov kho cellulose ether muab los ntawm cellulose los ntawm ntau cov tshuaj tiv thaiv. Nws yog tus cwj pwm los ntawm kev muaj cov methyl thiab hydroxyethyl pawg ntawm cov pob txha cellulose.

Khoom:

1. Dej Solubility: MHEC yog soluble nyob rau hauv dej txias, tsim kom meej thiab viscous daws.
2. Thickening: Nws nthuav tawm cov khoom thickening zoo heev, ua rau nws muaj txiaj ntsig zoo li kev hloov kho rheology hauv ntau cov qauv.
3. Zaj duab xis tsim: MHEC tuaj yeem tsim cov yeeb yaj kiab hloov tau yooj yim thiab sib koom ua ke, pab txhawb rau nws siv hauv cov txheej txheem thiab cov nplaum.
4. Stability: Nws muab kev ruaj ntseg rau emulsions thiab ncua kev kawm ntawv, txhim kho lub neej txee ntawm cov khoom tsim.
5. Adhesion: MHEC paub txog nws cov khoom nplaum, pab txhawb kev txhim kho adhesion hauv qee yam kev siv.

Daim ntawv thov:

1. Kev tsim kho kev lag luam:
   • Pobzeb Adhesives: MHEC yog siv rau hauv cov pobzeb nplaum los txhim kho kev ua haujlwm, tuav dej, thiab adhesion.
   • Mortars thiab Renders: Nws yog ua haujlwm hauv cov cement-based mortars thiab renders los txhim kho cov dej tuav thiab ua haujlwm.
   • Self-Leveling Compounds: MHEC yog siv nyob rau hauv tus kheej-leveling tebchaw rau nws thickening thiab stabilizing zog.
2. Coatings thiab Paints:
   • MHEC yog siv rau hauv cov xim dej thiab cov txheej txheem ua cov thickener thiab stabilizer. Nws pab txhawb kev txhim kho brushability thiab kev ua tau zoo ntawm cov txheej txheem.
3. Adhesives:
   • MHEC yog siv nyob rau hauv ntau yam nplaum los txhim kho adhesion thiab txhim kho cov khoom rheological ntawm cov nplaum formulations.
4. Pharmaceuticals:
   • Hauv kev lag luam tshuaj, MHEC yog siv los ua ib qho kev sib khi, disintegrant, thiab zaj duab xis-tsim tus neeg sawv cev hauv cov ntsiav tshuaj formulations.

Kev tsim khoom:

Kev tsim khoom ntawm MHEC suav nrog etherification ntawm cellulose nrog kev sib xyaw ntawm methyl chloride thiab ethylene oxide. Cov xwm txheej tshwj xeeb thiab cov reagent piv tau raug tswj kom ua tiav qhov kev xav tau ntawm kev hloov pauv (DS) thiab kho cov khoom ntawm cov khoom kawg.

Kev Tswj Xyuas Zoo:

Kev tswj xyuas kev ua tau zoo, suav nrog cov txheej txheem tshuaj ntsuam xyuas xws li nuclear magnetic resonance (NMR) spectroscopy, tau ua haujlwm los xyuas kom meej tias qhov kev hloov pauv nyob rau hauv qhov kev teev tseg thiab cov khoom ua tau raws li cov qauv xav tau.

MHEC qhov kev ua tau zoo ua rau nws muaj txiaj ntsig zoo hauv ntau hom kev tsim, pab txhim kho kev ua haujlwm zoo hauv cov khoom siv, txheej, nplaum, thiab tshuaj. Cov neeg tsim khoom tuaj yeem muab cov qib sib txawv ntawm MHEC kom tau raws li cov kev xav tau ntawm ntau yam kev lag luam.